Global Patent Index - EP 3438089 A1

EP 3438089 A1 20190206 - PROCESSES FOR THE DIAZOTIZATION OF 2,5-DICHLOROANILINES

Title (en)

PROCESSES FOR THE DIAZOTIZATION OF 2,5-DICHLOROANILINES

Title (de)

VERFAHREN ZUR DIAZOTIERUNG VON 2,5DICHLOROANILINEN

Title (fr)

PROCÉDÉS DE DIAZOTISATION DE 2,5 DICHLOROANILINES

Publication

EP 3438089 A1 20190206 (EN)

Application

EP 18179394 A 20141217

Priority

  • US 201361917605 P 20131218
  • EP 14871219 A 20141217
  • US 2014070764 W 20141217

Abstract (en)

The present disclosure relates, in general, to processes for converting 2,5-dichloroaniline compounds to the corresponding 2,5-dichlorobenzenediazonium compounds, and further relates to processes for the preparation of 2,5-dichloro-phenol which is a key intermediate used in the manufacture of dicamba.

IPC 8 full level

C07C 245/20 (2006.01); A01N 37/40 (2006.01); C07C 37/045 (2006.01); C07C 51/09 (2006.01); C07C 209/36 (2006.01)

CPC (source: EP US)

A01N 37/40 (2013.01 - US); C07C 37/045 (2013.01 - US); C07C 51/09 (2013.01 - US); C07C 209/365 (2013.01 - US); C07C 245/20 (2013.01 - EP US)

Citation (applicant)

  • US 4161611 A 19790717 - KIM DONG-WHEE [US]
  • US 4005151 A 19770125 - WATAYA MASATAKA, et al
  • US 4326882 A 19820427 - RICHTER SIDNEY B, et al
  • US 3013054 A 19611212 - RICHTER SIDNEY B
  • US 3345157 A 19671003 - RICHTER SIDNEY B
  • CN 102942474 A 20130227 - JIANGSU YANGNONG CHEMICAL CO, et al
  • CN 102125035 B 20130731 - ACHIEVER BIOCHEM CO LTD
  • CN 1830942 A 20060913 - SHENGHUA AGRICULTURAL CHEMICAL [CN]
  • ZHANG ET AL.: "Synthesis of Herbicide Dicamba", NONGYAO, vol. 41, no. 11, 2002, pages 13 - 14
  • ZHANG ET AL.: "Study on the Preparation of Dicamba", NONGYAO, vol. 41, no. 7, 2002, pages 15 - 17
  • ECKSTEIN ET AL., PRZEM. CHEM., vol. 58, no. 10, 1979, pages 533 - 536
  • MATYAKH ET AL.: "2-Methoxy-3,6-dichloro-benzoic acid", OTKRYTIYA, IZOBRET. PROM. OBRAZTSY, TOVARNYE, ZNAKE, vol. 50, no. 18, 1973, pages 177 - 178
  • ZHANG ET AL.: "Study on the O-Alkylation for 3,6-dichlorosalicylic Acid by Chioromethane", HUANGONG SHIKAN, vol. 16, no. 12, 2002, pages 45 - 48
  • J. ORG. CHEM., vol. 42, no. 8, 1977
  • J. AM. CHEM. SOC., vol. 72, no. 7, 1950

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

WO 2015095284 A1 20150625; AR 098798 A1 20160615; BR 112016014006 A2 20170808; CN 105873900 A 20160817; CN 105873900 B 20181130; EP 3083555 A1 20161026; EP 3083555 A4 20170816; EP 3083555 B1 20181003; EP 3438089 A1 20190206; US 2016318853 A1 20161103; US 2017342022 A1 20171130; US 9695114 B2 20170704; US 9878978 B2 20180130

DOCDB simple family (application)

US 2014070764 W 20141217; AR P140104720 A 20141217; BR 112016014006 A 20141217; CN 201480069644 A 20141217; EP 14871219 A 20141217; EP 18179394 A 20141217; US 201415106072 A 20141217; US 201715619711 A 20170612